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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / ata / sata_inic162x.c
blob9b6d7930d1c7940025877657e9062723b40921d4
1 /*
2 * sata_inic162x.c - Driver for Initio 162x SATA controllers
3 *
4 * Copyright 2006 SUSE Linux Products GmbH
5 * Copyright 2006 Tejun Heo <teheo@novell.com>
6 *
7 * This file is released under GPL v2.
8 *
9 * **** WARNING ****
10 *
11 * This driver never worked properly and unfortunately data corruption is
12 * relatively common. There isn't anyone working on the driver and there's
13 * no support from the vendor. Do not use this driver in any production
14 * environment.
15 *
16 * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491
17 * https://bugzilla.kernel.org/show_bug.cgi?id=60565
18 *
19 * *****************
20 *
21 * This controller is eccentric and easily locks up if something isn't
22 * right. Documentation is available at initio's website but it only
23 * documents registers (not programming model).
24 *
25 * This driver has interesting history. The first version was written
26 * from the documentation and a 2.4 IDE driver posted on a Taiwan
27 * company, which didn't use any IDMA features and couldn't handle
28 * LBA48. The resulting driver couldn't handle LBA48 devices either
29 * making it pretty useless.
30 *
31 * After a while, initio picked the driver up, renamed it to
32 * sata_initio162x, updated it to use IDMA for ATA DMA commands and
33 * posted it on their website. It only used ATA_PROT_DMA for IDMA and
34 * attaching both devices and issuing IDMA and !IDMA commands
35 * simultaneously broke it due to PIRQ masking interaction but it did
36 * show how to use the IDMA (ADMA + some initio specific twists)
37 * engine.
38 *
39 * Then, I picked up their changes again and here's the usable driver
40 * which uses IDMA for everything. Everything works now including
41 * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some
42 * issues tho. Result Tf is not resported properly, NCQ isn't
43 * supported yet and CD/DVD writing works with DMA assisted PIO
44 * protocol (which, for native SATA devices, shouldn't cause any
45 * noticeable difference).
46 *
47 * Anyways, so, here's finally a working driver for inic162x. Enjoy!
48 *
49 * initio: If you guys wanna improve the driver regarding result TF
50 * access and other stuff, please feel free to contact me. I'll be
51 * happy to assist.
52 */
53
54 #include <linux/gfp.h>
55 #include <linux/kernel.h>
56 #include <linux/module.h>
57 #include <linux/pci.h>
58 #include <scsi/scsi_host.h>
59 #include <linux/libata.h>
60 #include <linux/blkdev.h>
61 #include <scsi/scsi_device.h>
62
63 #define DRV_NAME "sata_inic162x"
64 #define DRV_VERSION "0.4"
65
66 enum {
67 MMIO_BAR_PCI = 5,
68 MMIO_BAR_CARDBUS = 1,
69
70 NR_PORTS = 2,
71
72 IDMA_CPB_TBL_SIZE = 4 * 32,
73
74 INIC_DMA_BOUNDARY = 0xffffff,
75
76 HOST_ACTRL = 0x08,
77 HOST_CTL = 0x7c,
78 HOST_STAT = 0x7e,
79 HOST_IRQ_STAT = 0xbc,
80 HOST_IRQ_MASK = 0xbe,
81
82 PORT_SIZE = 0x40,
83
84 /* registers for ATA TF operation */
85 PORT_TF_DATA = 0x00,
86 PORT_TF_FEATURE = 0x01,
87 PORT_TF_NSECT = 0x02,
88 PORT_TF_LBAL = 0x03,
89 PORT_TF_LBAM = 0x04,
90 PORT_TF_LBAH = 0x05,
91 PORT_TF_DEVICE = 0x06,
92 PORT_TF_COMMAND = 0x07,
93 PORT_TF_ALT_STAT = 0x08,
94 PORT_IRQ_STAT = 0x09,
95 PORT_IRQ_MASK = 0x0a,
96 PORT_PRD_CTL = 0x0b,
97 PORT_PRD_ADDR = 0x0c,
98 PORT_PRD_XFERLEN = 0x10,
99 PORT_CPB_CPBLAR = 0x18,
100 PORT_CPB_PTQFIFO = 0x1c,
101
102 /* IDMA register */
103 PORT_IDMA_CTL = 0x14,
104 PORT_IDMA_STAT = 0x16,
105
106 PORT_RPQ_FIFO = 0x1e,
107 PORT_RPQ_CNT = 0x1f,
108
109 PORT_SCR = 0x20,
110
111 /* HOST_CTL bits */
112 HCTL_LEDEN = (1 << 3), /* enable LED operation */
113 HCTL_IRQOFF = (1 << 8), /* global IRQ off */
114 HCTL_FTHD0 = (1 << 10), /* fifo threshold 0 */
115 HCTL_FTHD1 = (1 << 11), /* fifo threshold 1*/
116 HCTL_PWRDWN = (1 << 12), /* power down PHYs */
117 HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */
118 HCTL_RPGSEL = (1 << 15), /* register page select */
119
120 HCTL_KNOWN_BITS = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST |
121 HCTL_RPGSEL,
122
123 /* HOST_IRQ_(STAT|MASK) bits */
124 HIRQ_PORT0 = (1 << 0),
125 HIRQ_PORT1 = (1 << 1),
126 HIRQ_SOFT = (1 << 14),
127 HIRQ_GLOBAL = (1 << 15), /* STAT only */
128
129 /* PORT_IRQ_(STAT|MASK) bits */
130 PIRQ_OFFLINE = (1 << 0), /* device unplugged */
131 PIRQ_ONLINE = (1 << 1), /* device plugged */
132 PIRQ_COMPLETE = (1 << 2), /* completion interrupt */
133 PIRQ_FATAL = (1 << 3), /* fatal error */
134 PIRQ_ATA = (1 << 4), /* ATA interrupt */
135 PIRQ_REPLY = (1 << 5), /* reply FIFO not empty */
136 PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */
137
138 PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
139 PIRQ_MASK_DEFAULT = PIRQ_REPLY | PIRQ_ATA,
140 PIRQ_MASK_FREEZE = 0xff,
141
142 /* PORT_PRD_CTL bits */
143 PRD_CTL_START = (1 << 0),
144 PRD_CTL_WR = (1 << 3),
145 PRD_CTL_DMAEN = (1 << 7), /* DMA enable */
146
147 /* PORT_IDMA_CTL bits */
148 IDMA_CTL_RST_ATA = (1 << 2), /* hardreset ATA bus */
149 IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinary */
150 IDMA_CTL_GO = (1 << 7), /* IDMA mode go */
151 IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */
152
153 /* PORT_IDMA_STAT bits */
154 IDMA_STAT_PERR = (1 << 0), /* PCI ERROR MODE */
155 IDMA_STAT_CPBERR = (1 << 1), /* ADMA CPB error */
156 IDMA_STAT_LGCY = (1 << 3), /* ADMA legacy */
157 IDMA_STAT_UIRQ = (1 << 4), /* ADMA unsolicited irq */
158 IDMA_STAT_STPD = (1 << 5), /* ADMA stopped */
159 IDMA_STAT_PSD = (1 << 6), /* ADMA pause */
160 IDMA_STAT_DONE = (1 << 7), /* ADMA done */
161
162 IDMA_STAT_ERR = IDMA_STAT_PERR | IDMA_STAT_CPBERR,
163
164 /* CPB Control Flags*/
165 CPB_CTL_VALID = (1 << 0), /* CPB valid */
166 CPB_CTL_QUEUED = (1 << 1), /* queued command */
167 CPB_CTL_DATA = (1 << 2), /* data, rsvd in datasheet */
168 CPB_CTL_IEN = (1 << 3), /* PCI interrupt enable */
169 CPB_CTL_DEVDIR = (1 << 4), /* device direction control */
170
171 /* CPB Response Flags */
172 CPB_RESP_DONE = (1 << 0), /* ATA command complete */
173 CPB_RESP_REL = (1 << 1), /* ATA release */
174 CPB_RESP_IGNORED = (1 << 2), /* CPB ignored */
175 CPB_RESP_ATA_ERR = (1 << 3), /* ATA command error */
176 CPB_RESP_SPURIOUS = (1 << 4), /* ATA spurious interrupt error */
177 CPB_RESP_UNDERFLOW = (1 << 5), /* APRD deficiency length error */
178 CPB_RESP_OVERFLOW = (1 << 6), /* APRD exccess length error */
179 CPB_RESP_CPB_ERR = (1 << 7), /* CPB error flag */
180
181 /* PRD Control Flags */
182 PRD_DRAIN = (1 << 1), /* ignore data excess */
183 PRD_CDB = (1 << 2), /* atapi packet command pointer */
184 PRD_DIRECT_INTR = (1 << 3), /* direct interrupt */
185 PRD_DMA = (1 << 4), /* data transfer method */
186 PRD_WRITE = (1 << 5), /* data dir, rsvd in datasheet */
187 PRD_IOM = (1 << 6), /* io/memory transfer */
188 PRD_END = (1 << 7), /* APRD chain end */
189 };
190
191 /* Comman Parameter Block */
192 struct inic_cpb {
193 u8 resp_flags; /* Response Flags */
194 u8 error; /* ATA Error */
195 u8 status; /* ATA Status */
196 u8 ctl_flags; /* Control Flags */
197 __le32 len; /* Total Transfer Length */
198 __le32 prd; /* First PRD pointer */
199 u8 rsvd[4];
200 /* 16 bytes */
201 u8 feature; /* ATA Feature */
202 u8 hob_feature; /* ATA Ex. Feature */
203 u8 device; /* ATA Device/Head */
204 u8 mirctl; /* Mirror Control */
205 u8 nsect; /* ATA Sector Count */
206 u8 hob_nsect; /* ATA Ex. Sector Count */
207 u8 lbal; /* ATA Sector Number */
208 u8 hob_lbal; /* ATA Ex. Sector Number */
209 u8 lbam; /* ATA Cylinder Low */
210 u8 hob_lbam; /* ATA Ex. Cylinder Low */
211 u8 lbah; /* ATA Cylinder High */
212 u8 hob_lbah; /* ATA Ex. Cylinder High */
213 u8 command; /* ATA Command */
214 u8 ctl; /* ATA Control */
215 u8 slave_error; /* Slave ATA Error */
216 u8 slave_status; /* Slave ATA Status */
217 /* 32 bytes */
218 } __packed;
219
220 /* Physical Region Descriptor */
221 struct inic_prd {
222 __le32 mad; /* Physical Memory Address */
223 __le16 len; /* Transfer Length */
224 u8 rsvd;
225 u8 flags; /* Control Flags */
226 } __packed;
227
228 struct inic_pkt {
229 struct inic_cpb cpb;
230 struct inic_prd prd[LIBATA_MAX_PRD + 1]; /* + 1 for cdb */
231 u8 cdb[ATAPI_CDB_LEN];
232 } __packed;
233
234 struct inic_host_priv {
235 void __iomem *mmio_base;
236 u16 cached_hctl;
237 };
238
239 struct inic_port_priv {
240 struct inic_pkt *pkt;
241 dma_addr_t pkt_dma;
242 u32 *cpb_tbl;
243 dma_addr_t cpb_tbl_dma;
244 };
245
246 static struct scsi_host_template inic_sht = {
247 ATA_BASE_SHT(DRV_NAME),
248 .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */
249 .dma_boundary = INIC_DMA_BOUNDARY,
250 };
251
252 static const int scr_map[] = {
253 [SCR_STATUS] = 0,
254 [SCR_ERROR] = 1,
255 [SCR_CONTROL] = 2,
256 };
257
258 static void __iomem *inic_port_base(struct ata_port *ap)
259 {
260 struct inic_host_priv *hpriv = ap->host->private_data;
261
262 return hpriv->mmio_base + ap->port_no * PORT_SIZE;
263 }
264
265 static void inic_reset_port(void __iomem *port_base)
266 {
267 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
268
269 /* stop IDMA engine */
270 readw(idma_ctl); /* flush */
271 msleep(1);
272
273 /* mask IRQ and assert reset */
274 writew(IDMA_CTL_RST_IDMA, idma_ctl);
275 readw(idma_ctl); /* flush */
276 msleep(1);
277
278 /* release reset */
279 writew(0, idma_ctl);
280
281 /* clear irq */
282 writeb(0xff, port_base + PORT_IRQ_STAT);
283 }
284
285 static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val)
286 {
287 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
288
289 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
290 return -EINVAL;
291
292 *val = readl(scr_addr + scr_map[sc_reg] * 4);
293
294 /* this controller has stuck DIAG.N, ignore it */
295 if (sc_reg == SCR_ERROR)
296 *val &= ~SERR_PHYRDY_CHG;
297 return 0;
298 }
299
300 static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val)
301 {
302 void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR;
303
304 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
305 return -EINVAL;
306
307 writel(val, scr_addr + scr_map[sc_reg] * 4);
308 return 0;
309 }
310
311 static void inic_stop_idma(struct ata_port *ap)
312 {
313 void __iomem *port_base = inic_port_base(ap);
314
315 readb(port_base + PORT_RPQ_FIFO);
316 readb(port_base + PORT_RPQ_CNT);
317 writew(0, port_base + PORT_IDMA_CTL);
318 }
319
320 static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat)
321 {
322 struct ata_eh_info *ehi = &ap->link.eh_info;
323 struct inic_port_priv *pp = ap->private_data;
324 struct inic_cpb *cpb = &pp->pkt->cpb;
325 bool freeze = false;
326
327 ata_ehi_clear_desc(ehi);
328 ata_ehi_push_desc(ehi, "irq_stat=0x%x idma_stat=0x%x",
329 irq_stat, idma_stat);
330
331 inic_stop_idma(ap);
332
333 if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
334 ata_ehi_push_desc(ehi, "hotplug");
335 ata_ehi_hotplugged(ehi);
336 freeze = true;
337 }
338
339 if (idma_stat & IDMA_STAT_PERR) {
340 ata_ehi_push_desc(ehi, "PCI error");
341 freeze = true;
342 }
343
344 if (idma_stat & IDMA_STAT_CPBERR) {
345 ata_ehi_push_desc(ehi, "CPB error");
346
347 if (cpb->resp_flags & CPB_RESP_IGNORED) {
348 __ata_ehi_push_desc(ehi, " ignored");
349 ehi->err_mask |= AC_ERR_INVALID;
350 freeze = true;
351 }
352
353 if (cpb->resp_flags & CPB_RESP_ATA_ERR)
354 ehi->err_mask |= AC_ERR_DEV;
355
356 if (cpb->resp_flags & CPB_RESP_SPURIOUS) {
357 __ata_ehi_push_desc(ehi, " spurious-intr");
358 ehi->err_mask |= AC_ERR_HSM;
359 freeze = true;
360 }
361
362 if (cpb->resp_flags &
363 (CPB_RESP_UNDERFLOW | CPB_RESP_OVERFLOW)) {
364 __ata_ehi_push_desc(ehi, " data-over/underflow");
365 ehi->err_mask |= AC_ERR_HSM;
366 freeze = true;
367 }
368 }
369
370 if (freeze)
371 ata_port_freeze(ap);
372 else
373 ata_port_abort(ap);
374 }
375
376 static void inic_host_intr(struct ata_port *ap)
377 {
378 void __iomem *port_base = inic_port_base(ap);
379 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
380 u8 irq_stat;
381 u16 idma_stat;
382
383 /* read and clear IRQ status */
384 irq_stat = readb(port_base + PORT_IRQ_STAT);
385 writeb(irq_stat, port_base + PORT_IRQ_STAT);
386 idma_stat = readw(port_base + PORT_IDMA_STAT);
387
388 if (unlikely((irq_stat & PIRQ_ERR) || (idma_stat & IDMA_STAT_ERR)))
389 inic_host_err_intr(ap, irq_stat, idma_stat);
390
391 if (unlikely(!qc))
392 goto spurious;
393
394 if (likely(idma_stat & IDMA_STAT_DONE)) {
395 inic_stop_idma(ap);
396
397 /* Depending on circumstances, device error
398 * isn't reported by IDMA, check it explicitly.
399 */
400 if (unlikely(readb(port_base + PORT_TF_COMMAND) &
401 (ATA_DF | ATA_ERR)))
402 qc->err_mask |= AC_ERR_DEV;
403
404 ata_qc_complete(qc);
405 return;
406 }
407
408 spurious:
409 ata_port_warn(ap, "unhandled interrupt: cmd=0x%x irq_stat=0x%x idma_stat=0x%x\n",
410 qc ? qc->tf.command : 0xff, irq_stat, idma_stat);
411 }
412
413 static irqreturn_t inic_interrupt(int irq, void *dev_instance)
414 {
415 struct ata_host *host = dev_instance;
416 struct inic_host_priv *hpriv = host->private_data;
417 u16 host_irq_stat;
418 int i, handled = 0;
419
420 host_irq_stat = readw(hpriv->mmio_base + HOST_IRQ_STAT);
421
422 if (unlikely(!(host_irq_stat & HIRQ_GLOBAL)))
423 goto out;
424
425 spin_lock(&host->lock);
426
427 for (i = 0; i < NR_PORTS; i++)
428 if (host_irq_stat & (HIRQ_PORT0 << i)) {
429 inic_host_intr(host->ports[i]);
430 handled++;
431 }
432
433 spin_unlock(&host->lock);
434
435 out:
436 return IRQ_RETVAL(handled);
437 }
438
439 static int inic_check_atapi_dma(struct ata_queued_cmd *qc)
440 {
441 /* For some reason ATAPI_PROT_DMA doesn't work for some
442 * commands including writes and other misc ops. Use PIO
443 * protocol instead, which BTW is driven by the DMA engine
444 * anyway, so it shouldn't make much difference for native
445 * SATA devices.
446 */
447 if (atapi_cmd_type(qc->cdb[0]) == READ)
448 return 0;
449 return 1;
450 }
451
452 static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc)
453 {
454 struct scatterlist *sg;
455 unsigned int si;
456 u8 flags = 0;
457
458 if (qc->tf.flags & ATA_TFLAG_WRITE)
459 flags |= PRD_WRITE;
460
461 if (ata_is_dma(qc->tf.protocol))
462 flags |= PRD_DMA;
463
464 for_each_sg(qc->sg, sg, qc->n_elem, si) {
465 prd->mad = cpu_to_le32(sg_dma_address(sg));
466 prd->len = cpu_to_le16(sg_dma_len(sg));
467 prd->flags = flags;
468 prd++;
469 }
470
471 WARN_ON(!si);
472 prd[-1].flags |= PRD_END;
473 }
474
475 static void inic_qc_prep(struct ata_queued_cmd *qc)
476 {
477 struct inic_port_priv *pp = qc->ap->private_data;
478 struct inic_pkt *pkt = pp->pkt;
479 struct inic_cpb *cpb = &pkt->cpb;
480 struct inic_prd *prd = pkt->prd;
481 bool is_atapi = ata_is_atapi(qc->tf.protocol);
482 bool is_data = ata_is_data(qc->tf.protocol);
483 unsigned int cdb_len = 0;
484
485 VPRINTK("ENTER\n");
486
487 if (is_atapi)
488 cdb_len = qc->dev->cdb_len;
489
490 /* prepare packet, based on initio driver */
491 memset(pkt, 0, sizeof(struct inic_pkt));
492
493 cpb->ctl_flags = CPB_CTL_VALID | CPB_CTL_IEN;
494 if (is_atapi || is_data)
495 cpb->ctl_flags |= CPB_CTL_DATA;
496
497 cpb->len = cpu_to_le32(qc->nbytes + cdb_len);
498 cpb->prd = cpu_to_le32(pp->pkt_dma + offsetof(struct inic_pkt, prd));
499
500 cpb->device = qc->tf.device;
501 cpb->feature = qc->tf.feature;
502 cpb->nsect = qc->tf.nsect;
503 cpb->lbal = qc->tf.lbal;
504 cpb->lbam = qc->tf.lbam;
505 cpb->lbah = qc->tf.lbah;
506
507 if (qc->tf.flags & ATA_TFLAG_LBA48) {
508 cpb->hob_feature = qc->tf.hob_feature;
509 cpb->hob_nsect = qc->tf.hob_nsect;
510 cpb->hob_lbal = qc->tf.hob_lbal;
511 cpb->hob_lbam = qc->tf.hob_lbam;
512 cpb->hob_lbah = qc->tf.hob_lbah;
513 }
514
515 cpb->command = qc->tf.command;
516 /* don't load ctl - dunno why. it's like that in the initio driver */
517
518 /* setup PRD for CDB */
519 if (is_atapi) {
520 memcpy(pkt->cdb, qc->cdb, ATAPI_CDB_LEN);
521 prd->mad = cpu_to_le32(pp->pkt_dma +
522 offsetof(struct inic_pkt, cdb));
523 prd->len = cpu_to_le16(cdb_len);
524 prd->flags = PRD_CDB | PRD_WRITE;
525 if (!is_data)
526 prd->flags |= PRD_END;
527 prd++;
528 }
529
530 /* setup sg table */
531 if (is_data)
532 inic_fill_sg(prd, qc);
533
534 pp->cpb_tbl[0] = pp->pkt_dma;
535 }
536
537 static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
538 {
539 struct ata_port *ap = qc->ap;
540 void __iomem *port_base = inic_port_base(ap);
541
542 /* fire up the ADMA engine */
543 writew(HCTL_FTHD0 | HCTL_LEDEN, port_base + HOST_CTL);
544 writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL);
545 writeb(0, port_base + PORT_CPB_PTQFIFO);
546
547 return 0;
548 }
549
550 static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
551 {
552 void __iomem *port_base = inic_port_base(ap);
553
554 tf->feature = readb(port_base + PORT_TF_FEATURE);
555 tf->nsect = readb(port_base + PORT_TF_NSECT);
556 tf->lbal = readb(port_base + PORT_TF_LBAL);
557 tf->lbam = readb(port_base + PORT_TF_LBAM);
558 tf->lbah = readb(port_base + PORT_TF_LBAH);
559 tf->device = readb(port_base + PORT_TF_DEVICE);
560 tf->command = readb(port_base + PORT_TF_COMMAND);
561 }
562
563 static bool inic_qc_fill_rtf(struct ata_queued_cmd *qc)
564 {
565 struct ata_taskfile *rtf = &qc->result_tf;
566 struct ata_taskfile tf;
567
568 /* FIXME: Except for status and error, result TF access
569 * doesn't work. I tried reading from BAR0/2, CPB and BAR5.
570 * None works regardless of which command interface is used.
571 * For now return true iff status indicates device error.
572 * This means that we're reporting bogus sector for RW
573 * failures. Eeekk....
574 */
575 inic_tf_read(qc->ap, &tf);
576
577 if (!(tf.command & ATA_ERR))
578 return false;
579
580 rtf->command = tf.command;
581 rtf->feature = tf.feature;
582 return true;
583 }
584
585 static void inic_freeze(struct ata_port *ap)
586 {
587 void __iomem *port_base = inic_port_base(ap);
588
589 writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK);
590 writeb(0xff, port_base + PORT_IRQ_STAT);
591 }
592
593 static void inic_thaw(struct ata_port *ap)
594 {
595 void __iomem *port_base = inic_port_base(ap);
596
597 writeb(0xff, port_base + PORT_IRQ_STAT);
598 writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK);
599 }
600
601 static int inic_check_ready(struct ata_link *link)
602 {
603 void __iomem *port_base = inic_port_base(link->ap);
604
605 return ata_check_ready(readb(port_base + PORT_TF_COMMAND));
606 }
607
608 /*
609 * SRST and SControl hardreset don't give valid signature on this
610 * controller. Only controller specific hardreset mechanism works.
611 */
612 static int inic_hardreset(struct ata_link *link, unsigned int *class,
613 unsigned long deadline)
614 {
615 struct ata_port *ap = link->ap;
616 void __iomem *port_base = inic_port_base(ap);
617 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
618 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
619 int rc;
620
621 /* hammer it into sane state */
622 inic_reset_port(port_base);
623
624 writew(IDMA_CTL_RST_ATA, idma_ctl);
625 readw(idma_ctl); /* flush */
626 ata_msleep(ap, 1);
627 writew(0, idma_ctl);
628
629 rc = sata_link_resume(link, timing, deadline);
630 if (rc) {
631 ata_link_warn(link,
632 "failed to resume link after reset (errno=%d)\n",
633 rc);
634 return rc;
635 }
636
637 *class = ATA_DEV_NONE;
638 if (ata_link_online(link)) {
639 struct ata_taskfile tf;
640
641 /* wait for link to become ready */
642 rc = ata_wait_after_reset(link, deadline, inic_check_ready);
643 /* link occupied, -ENODEV too is an error */
644 if (rc) {
645 ata_link_warn(link,
646 "device not ready after hardreset (errno=%d)\n",
647 rc);
648 return rc;
649 }
650
651 inic_tf_read(ap, &tf);
652 *class = ata_dev_classify(&tf);
653 }
654
655 return 0;
656 }
657
658 static void inic_error_handler(struct ata_port *ap)
659 {
660 void __iomem *port_base = inic_port_base(ap);
661
662 inic_reset_port(port_base);
663 ata_std_error_handler(ap);
664 }
665
666 static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
667 {
668 /* make DMA engine forget about the failed command */
669 if (qc->flags & ATA_QCFLAG_FAILED)
670 inic_reset_port(inic_port_base(qc->ap));
671 }
672
673 static void init_port(struct ata_port *ap)
674 {
675 void __iomem *port_base = inic_port_base(ap);
676 struct inic_port_priv *pp = ap->private_data;
677
678 /* clear packet and CPB table */
679 memset(pp->pkt, 0, sizeof(struct inic_pkt));
680 memset(pp->cpb_tbl, 0, IDMA_CPB_TBL_SIZE);
681
682 /* setup CPB lookup table addresses */
683 writel(pp->cpb_tbl_dma, port_base + PORT_CPB_CPBLAR);
684 }
685
686 static int inic_port_resume(struct ata_port *ap)
687 {
688 init_port(ap);
689 return 0;
690 }
691
692 static int inic_port_start(struct ata_port *ap)
693 {
694 struct device *dev = ap->host->dev;
695 struct inic_port_priv *pp;
696
697 /* alloc and initialize private data */
698 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
699 if (!pp)
700 return -ENOMEM;
701 ap->private_data = pp;
702
703 /* Alloc resources */
704 pp->pkt = dmam_alloc_coherent(dev, sizeof(struct inic_pkt),
705 &pp->pkt_dma, GFP_KERNEL);
706 if (!pp->pkt)
707 return -ENOMEM;
708
709 pp->cpb_tbl = dmam_alloc_coherent(dev, IDMA_CPB_TBL_SIZE,
710 &pp->cpb_tbl_dma, GFP_KERNEL);
711 if (!pp->cpb_tbl)
712 return -ENOMEM;
713
714 init_port(ap);
715
716 return 0;
717 }
718
719 static struct ata_port_operations inic_port_ops = {
720 .inherits = &sata_port_ops,
721
722 .check_atapi_dma = inic_check_atapi_dma,
723 .qc_prep = inic_qc_prep,
724 .qc_issue = inic_qc_issue,
725 .qc_fill_rtf = inic_qc_fill_rtf,
726
727 .freeze = inic_freeze,
728 .thaw = inic_thaw,
729 .hardreset = inic_hardreset,
730 .error_handler = inic_error_handler,
731 .post_internal_cmd = inic_post_internal_cmd,
732
733 .scr_read = inic_scr_read,
734 .scr_write = inic_scr_write,
735
736 .port_resume = inic_port_resume,
737 .port_start = inic_port_start,
738 };
739
740 static const struct ata_port_info inic_port_info = {
741 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
742 .pio_mask = ATA_PIO4,
743 .mwdma_mask = ATA_MWDMA2,
744 .udma_mask = ATA_UDMA6,
745 .port_ops = &inic_port_ops
746 };
747
748 static int init_controller(void __iomem *mmio_base, u16 hctl)
749 {
750 int i;
751 u16 val;
752
753 hctl &= ~HCTL_KNOWN_BITS;
754
755 /* Soft reset whole controller. Spec says reset duration is 3
756 * PCI clocks, be generous and give it 10ms.
757 */
758 writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL);
759 readw(mmio_base + HOST_CTL); /* flush */
760
761 for (i = 0; i < 10; i++) {
762 msleep(1);
763 val = readw(mmio_base + HOST_CTL);
764 if (!(val & HCTL_SOFTRST))
765 break;
766 }
767
768 if (val & HCTL_SOFTRST)
769 return -EIO;
770
771 /* mask all interrupts and reset ports */
772 for (i = 0; i < NR_PORTS; i++) {
773 void __iomem *port_base = mmio_base + i * PORT_SIZE;
774
775 writeb(0xff, port_base + PORT_IRQ_MASK);
776 inic_reset_port(port_base);
777 }
778
779 /* port IRQ is masked now, unmask global IRQ */
780 writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL);
781 val = readw(mmio_base + HOST_IRQ_MASK);
782 val &= ~(HIRQ_PORT0 | HIRQ_PORT1);
783 writew(val, mmio_base + HOST_IRQ_MASK);
784
785 return 0;
786 }
787
788 #ifdef CONFIG_PM_SLEEP
789 static int inic_pci_device_resume(struct pci_dev *pdev)
790 {
791 struct ata_host *host = pci_get_drvdata(pdev);
792 struct inic_host_priv *hpriv = host->private_data;
793 int rc;
794
795 rc = ata_pci_device_do_resume(pdev);
796 if (rc)
797 return rc;
798
799 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
800 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
801 if (rc)
802 return rc;
803 }
804
805 ata_host_resume(host);
806
807 return 0;
808 }
809 #endif
810
811 static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
812 {
813 const struct ata_port_info *ppi[] = { &inic_port_info, NULL };
814 struct ata_host *host;
815 struct inic_host_priv *hpriv;
816 void __iomem * const *iomap;
817 int mmio_bar;
818 int i, rc;
819
820 ata_print_version_once(&pdev->dev, DRV_VERSION);
821
822 dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n");
823
824 /* alloc host */
825 host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS);
826 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
827 if (!host || !hpriv)
828 return -ENOMEM;
829
830 host->private_data = hpriv;
831
832 /* Acquire resources and fill host. Note that PCI and cardbus
833 * use different BARs.
834 */
835 rc = pcim_enable_device(pdev);
836 if (rc)
837 return rc;
838
839 if (pci_resource_flags(pdev, MMIO_BAR_PCI) & IORESOURCE_MEM)
840 mmio_bar = MMIO_BAR_PCI;
841 else
842 mmio_bar = MMIO_BAR_CARDBUS;
843
844 rc = pcim_iomap_regions(pdev, 1 << mmio_bar, DRV_NAME);
845 if (rc)
846 return rc;
847 host->iomap = iomap = pcim_iomap_table(pdev);
848 hpriv->mmio_base = iomap[mmio_bar];
849 hpriv->cached_hctl = readw(hpriv->mmio_base + HOST_CTL);
850
851 for (i = 0; i < NR_PORTS; i++) {
852 struct ata_port *ap = host->ports[i];
853
854 ata_port_pbar_desc(ap, mmio_bar, -1, "mmio");
855 ata_port_pbar_desc(ap, mmio_bar, i * PORT_SIZE, "port");
856 }
857
858 /* Set dma_mask. This devices doesn't support 64bit addressing. */
859 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
860 if (rc) {
861 dev_err(&pdev->dev, "32-bit DMA enable failed\n");
862 return rc;
863 }
864
865 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
866 if (rc) {
867 dev_err(&pdev->dev, "32-bit consistent DMA enable failed\n");
868 return rc;
869 }
870
871 /*
872 * This controller is braindamaged. dma_boundary is 0xffff
873 * like others but it will lock up the whole machine HARD if
874 * 65536 byte PRD entry is fed. Reduce maximum segment size.
875 */
876 rc = pci_set_dma_max_seg_size(pdev, 65536 - 512);
877 if (rc) {
878 dev_err(&pdev->dev, "failed to set the maximum segment size\n");
879 return rc;
880 }
881
882 rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl);
883 if (rc) {
884 dev_err(&pdev->dev, "failed to initialize controller\n");
885 return rc;
886 }
887
888 pci_set_master(pdev);
889 return ata_host_activate(host, pdev->irq, inic_interrupt, IRQF_SHARED,
890 &inic_sht);
891 }
892
893 static const struct pci_device_id inic_pci_tbl[] = {
894 { PCI_VDEVICE(INIT, 0x1622), },
895 { },
896 };
897
898 static struct pci_driver inic_pci_driver = {
899 .name = DRV_NAME,
900 .id_table = inic_pci_tbl,
901 #ifdef CONFIG_PM_SLEEP
902 .suspend = ata_pci_device_suspend,
903 .resume = inic_pci_device_resume,
904 #endif
905 .probe = inic_init_one,
906 .remove = ata_pci_remove_one,
907 };
908
909 module_pci_driver(inic_pci_driver);
910
911 MODULE_AUTHOR("Tejun Heo");
912 MODULE_DESCRIPTION("low-level driver for Initio 162x SATA");
913 MODULE_LICENSE("GPL v2");
914 MODULE_DEVICE_TABLE(pci, inic_pci_tbl);
915 MODULE_VERSION(DRV_VERSION);
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